Acta Cryst. (2011). E67, o9  [ doi:10.1107/S1600536810049809 ]

Spiro[indene-1,1'-benzo[e]indolin]-2'-one

J.-X. Chen, Y.-Q. Wang, S.-W. Liu, W.-E. Lin and Z.-P. Chen

Abstract: In the title compound, C₂₀H₁₃NO, the indene ring is disordered over two sites with an occupancy ratio of 0.557 (2):0.443 (2). Both disordered components of indene are nearly perpendicular to the naphthalene ring system, making dihedral angles of 90.9 (2) and 85.0 (5)°. The five-membered ring of the 1H-pyrrol-2(3H)-one adopts an envelope conformation with the spiro C atom at the flap position. Intermolecular classical N-HO and weak C-HO hydrogen bonding is present in the crystal structure.

Online 4 December 2010

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